Answer:
Actually, all of them may need to be cited
Step-by-step explanation:
I dont know what you´ve read in "Chapter 5" but i do know that is better to cite all of the possible answers... some more than others.
- For example, in answers #1 and #4: you explicitly mention that theres was a especific study (or critic) about the topic you are talking about. In that case it is absolutely necessary to cite.
- On the other hand, in answers #2 and #3, although you dont refer to a specific study or article, what you say is not common knowledge, and is better if you cite it so the person who reads it knows you are telling the truth and can trust you.